package com.letfox.finance.wxpay.util;






import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;


public class WeixinPay {

public static Logger lg=Logger.getLogger(WeixinPay.class);
private static final int BLACK = 0xff000000;
private static final int WHITE = 0xFFFFFFFF;

/**
* 获取微信支付的二维码地址
* @return
* @author chenp
* @throws Exception
*/
public static String getCodeUrl(WeChatParams ps) throws Exception {  
        /**
         * 账号信息  
         */
        String appid = WeChatConfig.APPID;//微信服务号的appid  
        String mch_id = WeChatConfig.MCHID; //微信支付商户号  
        String key = WeChatConfig.APIKEY; // 微信支付的API密钥  
        String notify_url = WeChatConfig.WECHAT_NOTIFY_URL_PC;//回调地址【注意，这里必须要使用外网的地址】     
        String ufdoder_url=WeChatConfig.UFDODER_URL;//微信下单API地址
        String trade_type = "NATIVE"; //类型【网页扫码支付】
        
        /**
         * 时间字符串
         */
        String currTime = PayForUtil.getCurrTime();
        String strTime = currTime.substring(8, currTime.length());  
        String strRandom = PayForUtil.buildRandom(4) + "";  
        String nonce_str = strTime + strRandom;  
          
        /**
         * 参数封装
         */
        SortedMap<Object,Object> packageParams = new TreeMap<Object,Object>();  
        packageParams.put("appid", appid);  
        packageParams.put("mch_id", mch_id);
        packageParams.put("nonce_str", nonce_str);//随机字符串
        packageParams.put("body", ps.body);//支付的商品名称  
        packageParams.put("out_trade_no", ps.out_trade_no);//商户订单号【备注：每次发起请求都需要随机的字符串，否则失败。】
        packageParams.put("total_fee", ps.total_fee);//支付金额
        packageParams.put("spbill_create_ip", PayForUtil.localIp());//客户端主机
        packageParams.put("notify_url", notify_url);
        packageParams.put("trade_type", trade_type);
        packageParams.put("attach", ps.attach);//额外的参数【业务类型+会员ID+支付类型】
        
  
        String sign = PayForUtil.createSign("UTF-8", packageParams,key);  //获取签名
        packageParams.put("sign", sign);  
          
        String requestXML = PayForUtil.getRequestXml(packageParams);//将请求参数转换成String类型  
        lg.info("微信支付请求参数的报文"+requestXML);  
        String resXml = HttpUtil.postData(ufdoder_url,requestXML);  //解析请求之后的xml参数并且转换成String类型
        Map map = XMLUtil.doXMLParse(resXml);  
        lg.info("微信支付响应参数的报文"+resXml); 
        String urlCode = (String) map.get("code_url");  
        
        return urlCode;  
}  

  /**
   * 将路径生成二维码图片
   * @author chenp
   * @param content
   * @param response
   */
  @SuppressWarnings({ "unchecked", "rawtypes" })
  public static void encodeQrcode(String content,HttpServletResponse response){
 
      if(StringUtils.isBlank(content))
          return;
     MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
     Map hints = new HashMap();
     BitMatrix bitMatrix = null;
     try {
         bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 250, 250,hints);
         BufferedImage image = toBufferedImage(bitMatrix);
         //输出二维码图片流
         try {
             ImageIO.write(image, "png", response.getOutputStream());
         } catch (IOException e) {
             e.printStackTrace();
         }
     } catch (WriterException e1) {
         e1.printStackTrace();
     }         
 }
  /**
  * 类型转换
  * @author chenp
  * @param matrix
  * @return
  */
public static BufferedImage toBufferedImage(BitMatrix matrix) {
         int width = matrix.getWidth();
         int height = matrix.getHeight();
         BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
         for (int x = 0; x < width; x++) {
             for (int y = 0; y < height; y++) {
                 image.setRGB(x, y, matrix.get(x, y) == true ? BLACK : WHITE);
             }
         }
         return image;
}
// 特殊字符处理  
public static String UrlEncode(String src)  throws UnsupportedEncodingException {  
   return URLEncoder.encode(src, "UTF-8").replace("+", "%20");  
}

}